Someone who coughs for a prolonged period of time after taking a hit from a pipe, bong, joint, etc. It is most often a result of the lungs not being accustomed to the irritating effects of marijuana smoke.

Cameron couldn't stop coughing after taking his first hit off the bong. His friends, who were long-time stoners, started laughing at him and yelling, "Chiefy McChieferson!"